5mm width - perfect for Celtic and Stained Glass quilt designs. You can make bias tape that can be temporarily bonded using an iron from any material you like. Set heat sensitive adhesive tape in the upper grove and a piece of material cut on the bias in the lower grove. By pulling the two at the same time and ironing them, you can easily make bias tape that can be temporarily bonded using an iron. By setting a piece of fabric cut on the bias only in the lover grove, you can easily make bias tape.